Intel Core i7-4790 vs Intel Core i5-8400. Specifications, performance, tests

Comprehensive background on the processors being compared, detailing their series, generation, and targeted market segment.

• Segment
  Desktop / Server Desktop / Server
• Family
  Intel Core i7 Intel Core i5
• Generation
  4 8
• CPU group
  Intel Core i 4000 Intel Core i 8000
• Predecessor
  -- Intel Core i5-7400
• Successor
  -- Intel Core i5-9400

Essential parameters including the number of cores, threads, base and turbo frequencies, and cache size. These metrics provide insight into the processor’s speed—higher values generally indicate better performance.

• Frequency
  3.60 GHz 2.80 GHz
• CPU Cores
  4 6
• Turbo (1 Core)
  4.00 GHz 4.00 GHz
• CPU Threads
  8 6
• Hyperthreading
  Yes No
• Overclocking
  No No
• Core architecture
  normal normal

The integrated graphics (iGPU) do not influence the CPU performance significantly; they serve as a substitute for a dedicated graphics card in the absence of one or are utilized in mobile devices.

• GPU name
  Intel HD Graphics 4600 Intel UHD Graphics 630
• GPU frequency
  0.35 GHz 0.35 GHz
• GPU (Turbo)
  1.20 GHz 1.15 GHz
• Execution units
  20 24
• Shader
  160 192
• Max. GPU Memory
  2 GB 64 GB
• Max. displays
  3 3
• Generation
  7.5 9.5
• DirectX Version
  11.1 12
• Technology
  22 nm 14 nm
• Release date
  Q2/2013 Q4/2017

This section details the built-in codecs used for encoding and decoding media content, which significantly enhance processing speed and efficiency.

• h265 / HEVC (8 bit)
  No Decode / Encode
• h265 / HEVC (10 bit)
  No Decode / Encode
• h264
  Decode / Encode Decode / Encode
• VP9
  No Decode / Encode
• VP8
  No Decode / Encode
• AV1
  No No
• AVC
  Decode / Encode Decode / Encode
• VC-1
  Decode Decode
• JPEG
  Decode Decode / Encode

Overview of the types and quantities of RAM supported by Intel Core i5-8400 and Intel Core i7-4790. The supported memory frequencies may vary depending on the motherboard configuration.

• Memory type
  DDR3-1600 DDR4-2666
• Max. Memory
  32 GB 128 GB
• ECC
  No No
• Memory channels
  2 2
• PCIe version
  3.0 3.0
• PCIe lanes
  16 16

• AES-NI
  Yes Yes

Analyze the TDP (Thermal Design Power) requirements of Intel Core i7-4790 and Intel Core i5-8400 to make an informed decision on the appropriate cooling system. Remember that TDP refers to thermal watts, not electrical watts.

• TDP (PL1)
  84 W 65 W

Information on architecture, interfaces, and additional instructions supported by Intel Core i7-4790 and Intel Core i5-8400, including virtual machine technologies and fabrication processes.

• Instruction set (ISA)
  x86-64 (64 bit) x86-64 (64 bit)
• Virtualization
  VT-x, VT-x EPT, VT-d VT-x, VT-x EPT, VT-d
• ISA extensions
  SSE4.1, SSE4.2, AVX2 SSE4.1, SSE4.2, AVX2
• L3-Cache
  8.00 MB 9.00 MB
• Architecture
  Haswell S Coffee Lake S
• Technology
  22 nm 14 nm
• Socket
  LGA 1150 LGA 1151-2
• Release date
  Q2/2014 Q4/2017